1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (c) 2015 Linaro Ltd.
4  * Copyright (c) 2015 Hisilicon Limited.
5  */
6 
7 #include "hisi_sas.h"
8 #define DRV_NAME "hisi_sas"
9 
10 #define DEV_IS_GONE(dev) \
11 	((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
12 
13 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
14 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
15 				void *funcdata);
16 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
17 				  struct domain_device *device);
18 static void hisi_sas_dev_gone(struct domain_device *device);
19 
20 struct hisi_sas_internal_abort_data {
21 	bool rst_ha_timeout; /* reset the HA for timeout */
22 };
23 
24 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
25 {
26 	switch (fis->command) {
27 	case ATA_CMD_FPDMA_WRITE:
28 	case ATA_CMD_FPDMA_READ:
29 	case ATA_CMD_FPDMA_RECV:
30 	case ATA_CMD_FPDMA_SEND:
31 	case ATA_CMD_NCQ_NON_DATA:
32 		return HISI_SAS_SATA_PROTOCOL_FPDMA;
33 
34 	case ATA_CMD_DOWNLOAD_MICRO:
35 	case ATA_CMD_ID_ATA:
36 	case ATA_CMD_PMP_READ:
37 	case ATA_CMD_READ_LOG_EXT:
38 	case ATA_CMD_PIO_READ:
39 	case ATA_CMD_PIO_READ_EXT:
40 	case ATA_CMD_PMP_WRITE:
41 	case ATA_CMD_WRITE_LOG_EXT:
42 	case ATA_CMD_PIO_WRITE:
43 	case ATA_CMD_PIO_WRITE_EXT:
44 		return HISI_SAS_SATA_PROTOCOL_PIO;
45 
46 	case ATA_CMD_DSM:
47 	case ATA_CMD_DOWNLOAD_MICRO_DMA:
48 	case ATA_CMD_PMP_READ_DMA:
49 	case ATA_CMD_PMP_WRITE_DMA:
50 	case ATA_CMD_READ:
51 	case ATA_CMD_READ_EXT:
52 	case ATA_CMD_READ_LOG_DMA_EXT:
53 	case ATA_CMD_READ_STREAM_DMA_EXT:
54 	case ATA_CMD_TRUSTED_RCV_DMA:
55 	case ATA_CMD_TRUSTED_SND_DMA:
56 	case ATA_CMD_WRITE:
57 	case ATA_CMD_WRITE_EXT:
58 	case ATA_CMD_WRITE_FUA_EXT:
59 	case ATA_CMD_WRITE_QUEUED:
60 	case ATA_CMD_WRITE_LOG_DMA_EXT:
61 	case ATA_CMD_WRITE_STREAM_DMA_EXT:
62 	case ATA_CMD_ZAC_MGMT_IN:
63 		return HISI_SAS_SATA_PROTOCOL_DMA;
64 
65 	case ATA_CMD_CHK_POWER:
66 	case ATA_CMD_DEV_RESET:
67 	case ATA_CMD_EDD:
68 	case ATA_CMD_FLUSH:
69 	case ATA_CMD_FLUSH_EXT:
70 	case ATA_CMD_VERIFY:
71 	case ATA_CMD_VERIFY_EXT:
72 	case ATA_CMD_SET_FEATURES:
73 	case ATA_CMD_STANDBY:
74 	case ATA_CMD_STANDBYNOW1:
75 	case ATA_CMD_ZAC_MGMT_OUT:
76 		return HISI_SAS_SATA_PROTOCOL_NONDATA;
77 
78 	case ATA_CMD_SET_MAX:
79 		switch (fis->features) {
80 		case ATA_SET_MAX_PASSWD:
81 		case ATA_SET_MAX_LOCK:
82 			return HISI_SAS_SATA_PROTOCOL_PIO;
83 
84 		case ATA_SET_MAX_PASSWD_DMA:
85 		case ATA_SET_MAX_UNLOCK_DMA:
86 			return HISI_SAS_SATA_PROTOCOL_DMA;
87 
88 		default:
89 			return HISI_SAS_SATA_PROTOCOL_NONDATA;
90 		}
91 
92 	default:
93 	{
94 		if (direction == DMA_NONE)
95 			return HISI_SAS_SATA_PROTOCOL_NONDATA;
96 		return HISI_SAS_SATA_PROTOCOL_PIO;
97 	}
98 	}
99 }
100 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
101 
102 void hisi_sas_sata_done(struct sas_task *task,
103 			    struct hisi_sas_slot *slot)
104 {
105 	struct task_status_struct *ts = &task->task_status;
106 	struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
107 	struct hisi_sas_status_buffer *status_buf =
108 			hisi_sas_status_buf_addr_mem(slot);
109 	u8 *iu = &status_buf->iu[0];
110 	struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
111 
112 	resp->frame_len = sizeof(struct dev_to_host_fis);
113 	memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
114 
115 	ts->buf_valid_size = sizeof(*resp);
116 }
117 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
118 
119 /*
120  * This function assumes linkrate mask fits in 8 bits, which it
121  * does for all HW versions supported.
122  */
123 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
124 {
125 	u8 rate = 0;
126 	int i;
127 
128 	max -= SAS_LINK_RATE_1_5_GBPS;
129 	for (i = 0; i <= max; i++)
130 		rate |= 1 << (i * 2);
131 	return rate;
132 }
133 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
134 
135 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
136 {
137 	return device->port->ha->lldd_ha;
138 }
139 
140 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
141 {
142 	return container_of(sas_port, struct hisi_sas_port, sas_port);
143 }
144 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
145 
146 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
147 {
148 	int phy_no;
149 
150 	for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
151 		hisi_sas_phy_enable(hisi_hba, phy_no, 0);
152 }
153 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
154 
155 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
156 {
157 	void *bitmap = hisi_hba->slot_index_tags;
158 
159 	__clear_bit(slot_idx, bitmap);
160 }
161 
162 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
163 {
164 	if (hisi_hba->hw->slot_index_alloc ||
165 	    slot_idx < HISI_SAS_RESERVED_IPTT) {
166 		spin_lock(&hisi_hba->lock);
167 		hisi_sas_slot_index_clear(hisi_hba, slot_idx);
168 		spin_unlock(&hisi_hba->lock);
169 	}
170 }
171 
172 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
173 {
174 	void *bitmap = hisi_hba->slot_index_tags;
175 
176 	__set_bit(slot_idx, bitmap);
177 }
178 
179 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
180 				     struct request *rq)
181 {
182 	int index;
183 	void *bitmap = hisi_hba->slot_index_tags;
184 
185 	if (rq)
186 		return rq->tag + HISI_SAS_RESERVED_IPTT;
187 
188 	spin_lock(&hisi_hba->lock);
189 	index = find_next_zero_bit(bitmap, HISI_SAS_RESERVED_IPTT,
190 				   hisi_hba->last_slot_index + 1);
191 	if (index >= HISI_SAS_RESERVED_IPTT) {
192 		index = find_next_zero_bit(bitmap,
193 				HISI_SAS_RESERVED_IPTT,
194 				0);
195 		if (index >= HISI_SAS_RESERVED_IPTT) {
196 			spin_unlock(&hisi_hba->lock);
197 			return -SAS_QUEUE_FULL;
198 		}
199 	}
200 	hisi_sas_slot_index_set(hisi_hba, index);
201 	hisi_hba->last_slot_index = index;
202 	spin_unlock(&hisi_hba->lock);
203 
204 	return index;
205 }
206 
207 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
208 			     struct hisi_sas_slot *slot, bool need_lock)
209 {
210 	int device_id = slot->device_id;
211 	struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
212 
213 	if (task) {
214 		struct device *dev = hisi_hba->dev;
215 
216 		if (!task->lldd_task)
217 			return;
218 
219 		task->lldd_task = NULL;
220 
221 		if (!sas_protocol_ata(task->task_proto)) {
222 			if (slot->n_elem) {
223 				if (task->task_proto & SAS_PROTOCOL_SSP)
224 					dma_unmap_sg(dev, task->scatter,
225 						     task->num_scatter,
226 						     task->data_dir);
227 				else
228 					dma_unmap_sg(dev, &task->smp_task.smp_req,
229 						     1, DMA_TO_DEVICE);
230 			}
231 			if (slot->n_elem_dif) {
232 				struct sas_ssp_task *ssp_task = &task->ssp_task;
233 				struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
234 
235 				dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
236 					     scsi_prot_sg_count(scsi_cmnd),
237 					     task->data_dir);
238 			}
239 		}
240 	}
241 
242 	if (need_lock) {
243 		spin_lock(&sas_dev->lock);
244 		list_del_init(&slot->entry);
245 		spin_unlock(&sas_dev->lock);
246 	} else {
247 		list_del_init(&slot->entry);
248 	}
249 
250 	memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
251 
252 	hisi_sas_slot_index_free(hisi_hba, slot->idx);
253 }
254 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
255 
256 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
257 				  struct hisi_sas_slot *slot)
258 {
259 	hisi_hba->hw->prep_smp(hisi_hba, slot);
260 }
261 
262 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
263 				  struct hisi_sas_slot *slot)
264 {
265 	hisi_hba->hw->prep_ssp(hisi_hba, slot);
266 }
267 
268 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
269 				  struct hisi_sas_slot *slot)
270 {
271 	hisi_hba->hw->prep_stp(hisi_hba, slot);
272 }
273 
274 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
275 				     struct hisi_sas_slot *slot)
276 {
277 	hisi_hba->hw->prep_abort(hisi_hba, slot);
278 }
279 
280 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
281 			       struct sas_task *task, int n_elem)
282 {
283 	struct device *dev = hisi_hba->dev;
284 
285 	if (!sas_protocol_ata(task->task_proto) && n_elem) {
286 		if (task->num_scatter) {
287 			dma_unmap_sg(dev, task->scatter, task->num_scatter,
288 				     task->data_dir);
289 		} else if (task->task_proto & SAS_PROTOCOL_SMP) {
290 			dma_unmap_sg(dev, &task->smp_task.smp_req,
291 				     1, DMA_TO_DEVICE);
292 		}
293 	}
294 }
295 
296 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
297 			    struct sas_task *task, int *n_elem)
298 {
299 	struct device *dev = hisi_hba->dev;
300 	int rc;
301 
302 	if (sas_protocol_ata(task->task_proto)) {
303 		*n_elem = task->num_scatter;
304 	} else {
305 		unsigned int req_len;
306 
307 		if (task->num_scatter) {
308 			*n_elem = dma_map_sg(dev, task->scatter,
309 					     task->num_scatter, task->data_dir);
310 			if (!*n_elem) {
311 				rc = -ENOMEM;
312 				goto prep_out;
313 			}
314 		} else if (task->task_proto & SAS_PROTOCOL_SMP) {
315 			*n_elem = dma_map_sg(dev, &task->smp_task.smp_req,
316 					     1, DMA_TO_DEVICE);
317 			if (!*n_elem) {
318 				rc = -ENOMEM;
319 				goto prep_out;
320 			}
321 			req_len = sg_dma_len(&task->smp_task.smp_req);
322 			if (req_len & 0x3) {
323 				rc = -EINVAL;
324 				goto err_out_dma_unmap;
325 			}
326 		}
327 	}
328 
329 	if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
330 		dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
331 			*n_elem);
332 		rc = -EINVAL;
333 		goto err_out_dma_unmap;
334 	}
335 	return 0;
336 
337 err_out_dma_unmap:
338 	/* It would be better to call dma_unmap_sg() here, but it's messy */
339 	hisi_sas_dma_unmap(hisi_hba, task, *n_elem);
340 prep_out:
341 	return rc;
342 }
343 
344 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
345 				   struct sas_task *task, int n_elem_dif)
346 {
347 	struct device *dev = hisi_hba->dev;
348 
349 	if (n_elem_dif) {
350 		struct sas_ssp_task *ssp_task = &task->ssp_task;
351 		struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
352 
353 		dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
354 			     scsi_prot_sg_count(scsi_cmnd),
355 			     task->data_dir);
356 	}
357 }
358 
359 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
360 				int *n_elem_dif, struct sas_task *task)
361 {
362 	struct device *dev = hisi_hba->dev;
363 	struct sas_ssp_task *ssp_task;
364 	struct scsi_cmnd *scsi_cmnd;
365 	int rc;
366 
367 	if (task->num_scatter) {
368 		ssp_task = &task->ssp_task;
369 		scsi_cmnd = ssp_task->cmd;
370 
371 		if (scsi_prot_sg_count(scsi_cmnd)) {
372 			*n_elem_dif = dma_map_sg(dev,
373 						 scsi_prot_sglist(scsi_cmnd),
374 						 scsi_prot_sg_count(scsi_cmnd),
375 						 task->data_dir);
376 
377 			if (!*n_elem_dif)
378 				return -ENOMEM;
379 
380 			if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
381 				dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
382 					*n_elem_dif);
383 				rc = -EINVAL;
384 				goto err_out_dif_dma_unmap;
385 			}
386 		}
387 	}
388 
389 	return 0;
390 
391 err_out_dif_dma_unmap:
392 	dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
393 		     scsi_prot_sg_count(scsi_cmnd), task->data_dir);
394 	return rc;
395 }
396 
397 static
398 void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
399 			   struct hisi_sas_slot *slot,
400 			   struct hisi_sas_dq *dq,
401 			   struct hisi_sas_device *sas_dev)
402 {
403 	struct hisi_sas_cmd_hdr *cmd_hdr_base;
404 	int dlvry_queue_slot, dlvry_queue;
405 	struct sas_task *task = slot->task;
406 	int wr_q_index;
407 
408 	spin_lock(&dq->lock);
409 	wr_q_index = dq->wr_point;
410 	dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
411 	list_add_tail(&slot->delivery, &dq->list);
412 	spin_unlock(&dq->lock);
413 	spin_lock(&sas_dev->lock);
414 	list_add_tail(&slot->entry, &sas_dev->list);
415 	spin_unlock(&sas_dev->lock);
416 
417 	dlvry_queue = dq->id;
418 	dlvry_queue_slot = wr_q_index;
419 
420 	slot->device_id = sas_dev->device_id;
421 	slot->dlvry_queue = dlvry_queue;
422 	slot->dlvry_queue_slot = dlvry_queue_slot;
423 	cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
424 	slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
425 
426 	task->lldd_task = slot;
427 
428 	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
429 	memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
430 	memset(hisi_sas_status_buf_addr_mem(slot), 0,
431 	       sizeof(struct hisi_sas_err_record));
432 
433 	switch (task->task_proto) {
434 	case SAS_PROTOCOL_SMP:
435 		hisi_sas_task_prep_smp(hisi_hba, slot);
436 		break;
437 	case SAS_PROTOCOL_SSP:
438 		hisi_sas_task_prep_ssp(hisi_hba, slot);
439 		break;
440 	case SAS_PROTOCOL_SATA:
441 	case SAS_PROTOCOL_STP:
442 	case SAS_PROTOCOL_STP_ALL:
443 		hisi_sas_task_prep_ata(hisi_hba, slot);
444 		break;
445 	case SAS_PROTOCOL_INTERNAL_ABORT:
446 		hisi_sas_task_prep_abort(hisi_hba, slot);
447 		break;
448 	default:
449 		return;
450 	}
451 
452 	/* Make slot memories observable before marking as ready */
453 	smp_wmb();
454 	WRITE_ONCE(slot->ready, 1);
455 
456 	spin_lock(&dq->lock);
457 	hisi_hba->hw->start_delivery(dq);
458 	spin_unlock(&dq->lock);
459 }
460 
461 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
462 {
463 	int n_elem = 0, n_elem_dif = 0;
464 	struct domain_device *device = task->dev;
465 	struct asd_sas_port *sas_port = device->port;
466 	struct hisi_sas_device *sas_dev = device->lldd_dev;
467 	bool internal_abort = sas_is_internal_abort(task);
468 	struct hisi_sas_dq *dq = NULL;
469 	struct hisi_sas_port *port;
470 	struct hisi_hba *hisi_hba;
471 	struct hisi_sas_slot *slot;
472 	struct request *rq = NULL;
473 	struct device *dev;
474 	int rc;
475 
476 	if (!sas_port) {
477 		struct task_status_struct *ts = &task->task_status;
478 
479 		ts->resp = SAS_TASK_UNDELIVERED;
480 		ts->stat = SAS_PHY_DOWN;
481 		/*
482 		 * libsas will use dev->port, should
483 		 * not call task_done for sata
484 		 */
485 		if (device->dev_type != SAS_SATA_DEV && !internal_abort)
486 			task->task_done(task);
487 		return -ECOMM;
488 	}
489 
490 	hisi_hba = dev_to_hisi_hba(device);
491 	dev = hisi_hba->dev;
492 
493 	switch (task->task_proto) {
494 	case SAS_PROTOCOL_SSP:
495 	case SAS_PROTOCOL_SMP:
496 	case SAS_PROTOCOL_SATA:
497 	case SAS_PROTOCOL_STP:
498 	case SAS_PROTOCOL_STP_ALL:
499 		if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
500 			if (!gfpflags_allow_blocking(gfp_flags))
501 				return -EINVAL;
502 
503 			down(&hisi_hba->sem);
504 			up(&hisi_hba->sem);
505 		}
506 
507 		if (DEV_IS_GONE(sas_dev)) {
508 			if (sas_dev)
509 				dev_info(dev, "task prep: device %d not ready\n",
510 					 sas_dev->device_id);
511 			else
512 				dev_info(dev, "task prep: device %016llx not ready\n",
513 					 SAS_ADDR(device->sas_addr));
514 
515 			return -ECOMM;
516 		}
517 
518 		port = to_hisi_sas_port(sas_port);
519 		if (!port->port_attached) {
520 			dev_info(dev, "task prep: %s port%d not attach device\n",
521 				 dev_is_sata(device) ? "SATA/STP" : "SAS",
522 				 device->port->id);
523 
524 				return -ECOMM;
525 		}
526 
527 		rq = sas_task_find_rq(task);
528 		if (rq) {
529 			unsigned int dq_index;
530 			u32 blk_tag;
531 
532 			blk_tag = blk_mq_unique_tag(rq);
533 			dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
534 			dq = &hisi_hba->dq[dq_index];
535 		} else {
536 			int queue;
537 
538 			if (hisi_hba->iopoll_q_cnt) {
539 				/*
540 				 * Use interrupt queue (queue 0) to deliver and complete
541 				 * internal IOs of libsas or libata when there is at least
542 				 * one iopoll queue
543 				 */
544 				queue = 0;
545 			} else {
546 				struct Scsi_Host *shost = hisi_hba->shost;
547 				struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
548 
549 				queue = qmap->mq_map[raw_smp_processor_id()];
550 			}
551 			dq = &hisi_hba->dq[queue];
552 		}
553 		break;
554 	case SAS_PROTOCOL_INTERNAL_ABORT:
555 		if (!hisi_hba->hw->prep_abort)
556 			return TMF_RESP_FUNC_FAILED;
557 
558 		if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags))
559 			return -EIO;
560 
561 		hisi_hba = dev_to_hisi_hba(device);
562 
563 		if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
564 			return -EINVAL;
565 
566 		port = to_hisi_sas_port(sas_port);
567 		dq = &hisi_hba->dq[task->abort_task.qid];
568 		break;
569 	default:
570 		dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n",
571 			task->task_proto);
572 		return -EINVAL;
573 	}
574 
575 	rc = hisi_sas_dma_map(hisi_hba, task, &n_elem);
576 	if (rc < 0)
577 		goto prep_out;
578 
579 	if (!sas_protocol_ata(task->task_proto)) {
580 		rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
581 		if (rc < 0)
582 			goto err_out_dma_unmap;
583 	}
584 
585 	if (!internal_abort && hisi_hba->hw->slot_index_alloc)
586 		rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
587 	else
588 		rc = hisi_sas_slot_index_alloc(hisi_hba, rq);
589 
590 	if (rc < 0)
591 		goto err_out_dif_dma_unmap;
592 
593 	slot = &hisi_hba->slot_info[rc];
594 	slot->n_elem = n_elem;
595 	slot->n_elem_dif = n_elem_dif;
596 	slot->task = task;
597 	slot->port = port;
598 
599 	slot->tmf = task->tmf;
600 	slot->is_internal = !!task->tmf || internal_abort;
601 
602 	/* protect task_prep and start_delivery sequence */
603 	hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev);
604 
605 	return 0;
606 
607 err_out_dif_dma_unmap:
608 	if (!sas_protocol_ata(task->task_proto))
609 		hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
610 err_out_dma_unmap:
611 	hisi_sas_dma_unmap(hisi_hba, task, n_elem);
612 prep_out:
613 	dev_err(dev, "task exec: failed[%d]!\n", rc);
614 	return rc;
615 }
616 
617 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
618 				 gfp_t gfp_flags)
619 {
620 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
621 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
622 
623 	if (!phy->phy_attached)
624 		return;
625 
626 	sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
627 
628 	if (sas_phy->phy) {
629 		struct sas_phy *sphy = sas_phy->phy;
630 
631 		sphy->negotiated_linkrate = sas_phy->linkrate;
632 		sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
633 		sphy->maximum_linkrate_hw =
634 			hisi_hba->hw->phy_get_max_linkrate();
635 		if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
636 			sphy->minimum_linkrate = phy->minimum_linkrate;
637 
638 		if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
639 			sphy->maximum_linkrate = phy->maximum_linkrate;
640 	}
641 
642 	if (phy->phy_type & PORT_TYPE_SAS) {
643 		struct sas_identify_frame *id;
644 
645 		id = (struct sas_identify_frame *)phy->frame_rcvd;
646 		id->dev_type = phy->identify.device_type;
647 		id->initiator_bits = SAS_PROTOCOL_ALL;
648 		id->target_bits = phy->identify.target_port_protocols;
649 	} else if (phy->phy_type & PORT_TYPE_SATA) {
650 		/* Nothing */
651 	}
652 
653 	sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
654 	sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
655 }
656 
657 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
658 {
659 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
660 	struct hisi_sas_device *sas_dev = NULL;
661 	int last = hisi_hba->last_dev_id;
662 	int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
663 	int i;
664 
665 	spin_lock(&hisi_hba->lock);
666 	for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
667 		if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
668 			int queue = i % hisi_hba->queue_count;
669 			struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
670 
671 			hisi_hba->devices[i].device_id = i;
672 			sas_dev = &hisi_hba->devices[i];
673 			sas_dev->dev_status = HISI_SAS_DEV_INIT;
674 			sas_dev->dev_type = device->dev_type;
675 			sas_dev->hisi_hba = hisi_hba;
676 			sas_dev->sas_device = device;
677 			sas_dev->dq = dq;
678 			spin_lock_init(&sas_dev->lock);
679 			INIT_LIST_HEAD(&hisi_hba->devices[i].list);
680 			break;
681 		}
682 		i++;
683 	}
684 	hisi_hba->last_dev_id = i;
685 	spin_unlock(&hisi_hba->lock);
686 
687 	return sas_dev;
688 }
689 
690 static void hisi_sas_sync_poll_cq(struct hisi_sas_cq *cq)
691 {
692 	/* make sure CQ entries being processed are processed to completion */
693 	spin_lock(&cq->poll_lock);
694 	spin_unlock(&cq->poll_lock);
695 }
696 
697 static bool hisi_sas_queue_is_poll(struct hisi_sas_cq *cq)
698 {
699 	struct hisi_hba *hisi_hba = cq->hisi_hba;
700 
701 	if (cq->id < hisi_hba->queue_count - hisi_hba->iopoll_q_cnt)
702 		return false;
703 	return true;
704 }
705 
706 static void hisi_sas_sync_cq(struct hisi_sas_cq *cq)
707 {
708 	if (hisi_sas_queue_is_poll(cq))
709 		hisi_sas_sync_poll_cq(cq);
710 	else
711 		synchronize_irq(cq->irq_no);
712 }
713 
714 void hisi_sas_sync_poll_cqs(struct hisi_hba *hisi_hba)
715 {
716 	int i;
717 
718 	for (i = 0; i < hisi_hba->queue_count; i++) {
719 		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
720 
721 		if (hisi_sas_queue_is_poll(cq))
722 			hisi_sas_sync_poll_cq(cq);
723 	}
724 }
725 EXPORT_SYMBOL_GPL(hisi_sas_sync_poll_cqs);
726 
727 void hisi_sas_sync_cqs(struct hisi_hba *hisi_hba)
728 {
729 	int i;
730 
731 	for (i = 0; i < hisi_hba->queue_count; i++) {
732 		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
733 
734 		hisi_sas_sync_cq(cq);
735 	}
736 }
737 EXPORT_SYMBOL_GPL(hisi_sas_sync_cqs);
738 
739 static void hisi_sas_tmf_aborted(struct sas_task *task)
740 {
741 	struct hisi_sas_slot *slot = task->lldd_task;
742 	struct domain_device *device = task->dev;
743 	struct hisi_sas_device *sas_dev = device->lldd_dev;
744 	struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
745 
746 	if (slot) {
747 		struct hisi_sas_cq *cq =
748 			   &hisi_hba->cq[slot->dlvry_queue];
749 		/*
750 		 * sync irq or poll queue to avoid free'ing task
751 		 * before using task in IO completion
752 		 */
753 		hisi_sas_sync_cq(cq);
754 		slot->task = NULL;
755 	}
756 }
757 
758 #define HISI_SAS_DISK_RECOVER_CNT 3
759 static int hisi_sas_init_device(struct domain_device *device)
760 {
761 	int rc = TMF_RESP_FUNC_COMPLETE;
762 	struct scsi_lun lun;
763 	int retry = HISI_SAS_DISK_RECOVER_CNT;
764 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
765 
766 	switch (device->dev_type) {
767 	case SAS_END_DEVICE:
768 		int_to_scsilun(0, &lun);
769 
770 		while (retry-- > 0) {
771 			rc = sas_abort_task_set(device, lun.scsi_lun);
772 			if (rc == TMF_RESP_FUNC_COMPLETE) {
773 				hisi_sas_release_task(hisi_hba, device);
774 				break;
775 			}
776 		}
777 		break;
778 	case SAS_SATA_DEV:
779 	case SAS_SATA_PM:
780 	case SAS_SATA_PM_PORT:
781 	case SAS_SATA_PENDING:
782 		/*
783 		 * If an expander is swapped when a SATA disk is attached then
784 		 * we should issue a hard reset to clear previous affiliation
785 		 * of STP target port, see SPL (chapter 6.19.4).
786 		 *
787 		 * However we don't need to issue a hard reset here for these
788 		 * reasons:
789 		 * a. When probing the device, libsas/libata already issues a
790 		 * hard reset in sas_probe_sata() -> ata_sas_async_probe().
791 		 * Note that in hisi_sas_debug_I_T_nexus_reset() we take care
792 		 * to issue a hard reset by checking the dev status (== INIT).
793 		 * b. When resetting the controller, this is simply unnecessary.
794 		 */
795 		while (retry-- > 0) {
796 			rc = hisi_sas_softreset_ata_disk(device);
797 			if (!rc)
798 				break;
799 		}
800 		break;
801 	default:
802 		break;
803 	}
804 
805 	return rc;
806 }
807 
808 int hisi_sas_slave_alloc(struct scsi_device *sdev)
809 {
810 	struct domain_device *ddev = sdev_to_domain_dev(sdev);
811 	struct hisi_sas_device *sas_dev = ddev->lldd_dev;
812 	int rc;
813 
814 	rc = sas_slave_alloc(sdev);
815 	if (rc)
816 		return rc;
817 
818 	rc = hisi_sas_init_device(ddev);
819 	if (rc)
820 		return rc;
821 	sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
822 	return 0;
823 }
824 EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc);
825 
826 static int hisi_sas_dev_found(struct domain_device *device)
827 {
828 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
829 	struct domain_device *parent_dev = device->parent;
830 	struct hisi_sas_device *sas_dev;
831 	struct device *dev = hisi_hba->dev;
832 	int rc;
833 
834 	if (hisi_hba->hw->alloc_dev)
835 		sas_dev = hisi_hba->hw->alloc_dev(device);
836 	else
837 		sas_dev = hisi_sas_alloc_dev(device);
838 	if (!sas_dev) {
839 		dev_err(dev, "fail alloc dev: max support %d devices\n",
840 			HISI_SAS_MAX_DEVICES);
841 		return -EINVAL;
842 	}
843 
844 	device->lldd_dev = sas_dev;
845 	hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
846 
847 	if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
848 		int phy_no;
849 
850 		phy_no = sas_find_attached_phy_id(&parent_dev->ex_dev, device);
851 		if (phy_no < 0) {
852 			dev_info(dev, "dev found: no attached "
853 				 "dev:%016llx at ex:%016llx\n",
854 				 SAS_ADDR(device->sas_addr),
855 				 SAS_ADDR(parent_dev->sas_addr));
856 			rc = phy_no;
857 			goto err_out;
858 		}
859 	}
860 
861 	dev_info(dev, "dev[%d:%x] found\n",
862 		sas_dev->device_id, sas_dev->dev_type);
863 
864 	return 0;
865 
866 err_out:
867 	hisi_sas_dev_gone(device);
868 	return rc;
869 }
870 
871 int hisi_sas_slave_configure(struct scsi_device *sdev)
872 {
873 	struct domain_device *dev = sdev_to_domain_dev(sdev);
874 	int ret = sas_slave_configure(sdev);
875 
876 	if (ret)
877 		return ret;
878 	if (!dev_is_sata(dev))
879 		sas_change_queue_depth(sdev, 64);
880 
881 	return 0;
882 }
883 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
884 
885 void hisi_sas_scan_start(struct Scsi_Host *shost)
886 {
887 	struct hisi_hba *hisi_hba = shost_priv(shost);
888 
889 	hisi_hba->hw->phys_init(hisi_hba);
890 }
891 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
892 
893 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
894 {
895 	struct hisi_hba *hisi_hba = shost_priv(shost);
896 	struct sas_ha_struct *sha = &hisi_hba->sha;
897 
898 	/* Wait for PHY up interrupt to occur */
899 	if (time < HZ)
900 		return 0;
901 
902 	sas_drain_work(sha);
903 	return 1;
904 }
905 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
906 
907 static void hisi_sas_phyup_work_common(struct work_struct *work,
908 		enum hisi_sas_phy_event event)
909 {
910 	struct hisi_sas_phy *phy =
911 		container_of(work, typeof(*phy), works[event]);
912 	struct hisi_hba *hisi_hba = phy->hisi_hba;
913 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
914 	int phy_no = sas_phy->id;
915 
916 	phy->wait_phyup_cnt = 0;
917 	if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
918 		hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
919 	hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
920 }
921 
922 static void hisi_sas_phyup_work(struct work_struct *work)
923 {
924 	hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
925 }
926 
927 static void hisi_sas_linkreset_work(struct work_struct *work)
928 {
929 	struct hisi_sas_phy *phy =
930 		container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
931 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
932 
933 	hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
934 }
935 
936 static void hisi_sas_phyup_pm_work(struct work_struct *work)
937 {
938 	struct hisi_sas_phy *phy =
939 		container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
940 	struct hisi_hba *hisi_hba = phy->hisi_hba;
941 	struct device *dev = hisi_hba->dev;
942 
943 	hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
944 	pm_runtime_put_sync(dev);
945 }
946 
947 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
948 	[HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
949 	[HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
950 	[HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
951 };
952 
953 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
954 				enum hisi_sas_phy_event event)
955 {
956 	struct hisi_hba *hisi_hba = phy->hisi_hba;
957 
958 	if (WARN_ON(event >= HISI_PHYES_NUM))
959 		return false;
960 
961 	return queue_work(hisi_hba->wq, &phy->works[event]);
962 }
963 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
964 
965 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
966 {
967 	struct hisi_sas_phy *phy = from_timer(phy, t, timer);
968 	struct hisi_hba *hisi_hba = phy->hisi_hba;
969 	struct device *dev = hisi_hba->dev;
970 	int phy_no = phy->sas_phy.id;
971 
972 	dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
973 	hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
974 }
975 
976 #define HISI_SAS_WAIT_PHYUP_RETRIES	10
977 
978 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
979 {
980 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
981 	struct device *dev = hisi_hba->dev;
982 	unsigned long flags;
983 
984 	dev_dbg(dev, "phy%d OOB ready\n", phy_no);
985 	spin_lock_irqsave(&phy->lock, flags);
986 	if (phy->phy_attached) {
987 		spin_unlock_irqrestore(&phy->lock, flags);
988 		return;
989 	}
990 
991 	if (!timer_pending(&phy->timer)) {
992 		if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
993 			phy->wait_phyup_cnt++;
994 			phy->timer.expires = jiffies +
995 					     HISI_SAS_WAIT_PHYUP_TIMEOUT;
996 			add_timer(&phy->timer);
997 			spin_unlock_irqrestore(&phy->lock, flags);
998 			return;
999 		}
1000 
1001 		dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
1002 			 phy_no, phy->wait_phyup_cnt);
1003 		phy->wait_phyup_cnt = 0;
1004 	}
1005 	spin_unlock_irqrestore(&phy->lock, flags);
1006 }
1007 
1008 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
1009 
1010 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
1011 {
1012 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1013 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
1014 	int i;
1015 
1016 	phy->hisi_hba = hisi_hba;
1017 	phy->port = NULL;
1018 	phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
1019 	phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
1020 	sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
1021 	sas_phy->class = SAS;
1022 	sas_phy->iproto = SAS_PROTOCOL_ALL;
1023 	sas_phy->tproto = 0;
1024 	sas_phy->type = PHY_TYPE_PHYSICAL;
1025 	sas_phy->role = PHY_ROLE_INITIATOR;
1026 	sas_phy->oob_mode = OOB_NOT_CONNECTED;
1027 	sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
1028 	sas_phy->id = phy_no;
1029 	sas_phy->sas_addr = &hisi_hba->sas_addr[0];
1030 	sas_phy->frame_rcvd = &phy->frame_rcvd[0];
1031 	sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
1032 	sas_phy->lldd_phy = phy;
1033 
1034 	for (i = 0; i < HISI_PHYES_NUM; i++)
1035 		INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
1036 
1037 	spin_lock_init(&phy->lock);
1038 
1039 	timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
1040 }
1041 
1042 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
1043 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
1044 {
1045 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1046 	struct asd_sas_phy *aphy = &phy->sas_phy;
1047 	struct sas_phy *sphy = aphy->phy;
1048 	unsigned long flags;
1049 
1050 	spin_lock_irqsave(&phy->lock, flags);
1051 
1052 	if (enable) {
1053 		/* We may have been enabled already; if so, don't touch */
1054 		if (!phy->enable)
1055 			sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1056 		hisi_hba->hw->phy_start(hisi_hba, phy_no);
1057 	} else {
1058 		sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1059 		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1060 	}
1061 	phy->enable = enable;
1062 	spin_unlock_irqrestore(&phy->lock, flags);
1063 }
1064 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1065 
1066 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1067 {
1068 	struct sas_ha_struct *sas_ha = sas_phy->ha;
1069 	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1070 	struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1071 	struct asd_sas_port *sas_port = sas_phy->port;
1072 	struct hisi_sas_port *port;
1073 	unsigned long flags;
1074 
1075 	if (!sas_port)
1076 		return;
1077 
1078 	port = to_hisi_sas_port(sas_port);
1079 	spin_lock_irqsave(&hisi_hba->lock, flags);
1080 	port->port_attached = 1;
1081 	port->id = phy->port_id;
1082 	phy->port = port;
1083 	sas_port->lldd_port = port;
1084 	spin_unlock_irqrestore(&hisi_hba->lock, flags);
1085 }
1086 
1087 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1088 				     struct hisi_sas_slot *slot, bool need_lock)
1089 {
1090 	if (task) {
1091 		unsigned long flags;
1092 		struct task_status_struct *ts;
1093 
1094 		ts = &task->task_status;
1095 
1096 		ts->resp = SAS_TASK_COMPLETE;
1097 		ts->stat = SAS_ABORTED_TASK;
1098 		spin_lock_irqsave(&task->task_state_lock, flags);
1099 		task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1100 		if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1101 			task->task_state_flags |= SAS_TASK_STATE_DONE;
1102 		spin_unlock_irqrestore(&task->task_state_lock, flags);
1103 	}
1104 
1105 	hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);
1106 }
1107 
1108 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1109 			struct domain_device *device)
1110 {
1111 	struct hisi_sas_slot *slot, *slot2;
1112 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1113 
1114 	spin_lock(&sas_dev->lock);
1115 	list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1116 		hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);
1117 
1118 	spin_unlock(&sas_dev->lock);
1119 }
1120 
1121 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1122 {
1123 	struct hisi_sas_device *sas_dev;
1124 	struct domain_device *device;
1125 	int i;
1126 
1127 	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1128 		sas_dev = &hisi_hba->devices[i];
1129 		device = sas_dev->sas_device;
1130 
1131 		if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1132 		    !device)
1133 			continue;
1134 
1135 		hisi_sas_release_task(hisi_hba, device);
1136 	}
1137 }
1138 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1139 
1140 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1141 				struct domain_device *device)
1142 {
1143 	if (hisi_hba->hw->dereg_device)
1144 		hisi_hba->hw->dereg_device(hisi_hba, device);
1145 }
1146 
1147 static int
1148 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1149 				 bool rst_ha_timeout)
1150 {
1151 	struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1152 	struct domain_device *device = sas_dev->sas_device;
1153 	struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1154 	int i, rc;
1155 
1156 	for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1157 		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1158 		const struct cpumask *mask = cq->irq_mask;
1159 
1160 		if (mask && !cpumask_intersects(cpu_online_mask, mask))
1161 			continue;
1162 		rc = sas_execute_internal_abort_dev(device, i, &data);
1163 		if (rc)
1164 			return rc;
1165 	}
1166 
1167 	return 0;
1168 }
1169 
1170 static void hisi_sas_dev_gone(struct domain_device *device)
1171 {
1172 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1173 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1174 	struct device *dev = hisi_hba->dev;
1175 	int ret = 0;
1176 
1177 	dev_info(dev, "dev[%d:%x] is gone\n",
1178 		 sas_dev->device_id, sas_dev->dev_type);
1179 
1180 	down(&hisi_hba->sem);
1181 	if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1182 		hisi_sas_internal_task_abort_dev(sas_dev, true);
1183 
1184 		hisi_sas_dereg_device(hisi_hba, device);
1185 
1186 		ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1187 		device->lldd_dev = NULL;
1188 	}
1189 
1190 	if (hisi_hba->hw->free_device)
1191 		hisi_hba->hw->free_device(sas_dev);
1192 
1193 	/* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1194 	if (!ret)
1195 		sas_dev->dev_type = SAS_PHY_UNUSED;
1196 	sas_dev->sas_device = NULL;
1197 	up(&hisi_hba->sem);
1198 }
1199 
1200 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1201 			struct sas_phy_linkrates *r)
1202 {
1203 	struct sas_phy_linkrates _r;
1204 
1205 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1206 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
1207 	enum sas_linkrate min, max;
1208 
1209 	if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1210 		return -EINVAL;
1211 
1212 	if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1213 		max = sas_phy->phy->maximum_linkrate;
1214 		min = r->minimum_linkrate;
1215 	} else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1216 		max = r->maximum_linkrate;
1217 		min = sas_phy->phy->minimum_linkrate;
1218 	} else
1219 		return -EINVAL;
1220 
1221 	_r.maximum_linkrate = max;
1222 	_r.minimum_linkrate = min;
1223 
1224 	sas_phy->phy->maximum_linkrate = max;
1225 	sas_phy->phy->minimum_linkrate = min;
1226 
1227 	hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1228 	msleep(100);
1229 	hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1230 	hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1231 
1232 	return 0;
1233 }
1234 
1235 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1236 				void *funcdata)
1237 {
1238 	struct hisi_sas_phy *phy = container_of(sas_phy,
1239 			struct hisi_sas_phy, sas_phy);
1240 	struct sas_ha_struct *sas_ha = sas_phy->ha;
1241 	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1242 	struct device *dev = hisi_hba->dev;
1243 	DECLARE_COMPLETION_ONSTACK(completion);
1244 	int phy_no = sas_phy->id;
1245 	u8 sts = phy->phy_attached;
1246 	int ret = 0;
1247 
1248 	down(&hisi_hba->sem);
1249 	phy->reset_completion = &completion;
1250 
1251 	switch (func) {
1252 	case PHY_FUNC_HARD_RESET:
1253 		hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1254 		break;
1255 
1256 	case PHY_FUNC_LINK_RESET:
1257 		hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1258 		msleep(100);
1259 		hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1260 		break;
1261 
1262 	case PHY_FUNC_DISABLE:
1263 		hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1264 		goto out;
1265 
1266 	case PHY_FUNC_SET_LINK_RATE:
1267 		ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1268 		break;
1269 
1270 	case PHY_FUNC_GET_EVENTS:
1271 		if (hisi_hba->hw->get_events) {
1272 			hisi_hba->hw->get_events(hisi_hba, phy_no);
1273 			goto out;
1274 		}
1275 		fallthrough;
1276 	case PHY_FUNC_RELEASE_SPINUP_HOLD:
1277 	default:
1278 		ret = -EOPNOTSUPP;
1279 		goto out;
1280 	}
1281 
1282 	if (sts && !wait_for_completion_timeout(&completion,
1283 		HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1284 		dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1285 			 phy_no, func);
1286 		if (phy->in_reset)
1287 			ret = -ETIMEDOUT;
1288 	}
1289 
1290 out:
1291 	phy->reset_completion = NULL;
1292 
1293 	up(&hisi_hba->sem);
1294 	return ret;
1295 }
1296 
1297 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1298 		bool reset, int pmp, u8 *fis)
1299 {
1300 	struct ata_taskfile tf;
1301 
1302 	ata_tf_init(dev, &tf);
1303 	if (reset)
1304 		tf.ctl |= ATA_SRST;
1305 	else
1306 		tf.ctl &= ~ATA_SRST;
1307 	tf.command = ATA_CMD_DEV_RESET;
1308 	ata_tf_to_fis(&tf, pmp, 0, fis);
1309 }
1310 
1311 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1312 {
1313 	u8 fis[20] = {0};
1314 	struct ata_port *ap = device->sata_dev.ap;
1315 	struct ata_link *link;
1316 	int rc = TMF_RESP_FUNC_FAILED;
1317 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1318 	struct device *dev = hisi_hba->dev;
1319 
1320 	ata_for_each_link(link, ap, EDGE) {
1321 		int pmp = sata_srst_pmp(link);
1322 
1323 		hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1324 		rc = sas_execute_ata_cmd(device, fis, -1);
1325 		if (rc != TMF_RESP_FUNC_COMPLETE)
1326 			break;
1327 	}
1328 
1329 	if (rc == TMF_RESP_FUNC_COMPLETE) {
1330 		ata_for_each_link(link, ap, EDGE) {
1331 			int pmp = sata_srst_pmp(link);
1332 
1333 			hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1334 			rc = sas_execute_ata_cmd(device, fis, -1);
1335 			if (rc != TMF_RESP_FUNC_COMPLETE)
1336 				dev_err(dev, "ata disk %016llx de-reset failed\n",
1337 					SAS_ADDR(device->sas_addr));
1338 		}
1339 	} else {
1340 		dev_err(dev, "ata disk %016llx reset failed\n",
1341 			SAS_ADDR(device->sas_addr));
1342 	}
1343 
1344 	if (rc == TMF_RESP_FUNC_COMPLETE)
1345 		hisi_sas_release_task(hisi_hba, device);
1346 
1347 	return rc;
1348 }
1349 
1350 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1351 {
1352 	u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1353 	int i;
1354 
1355 	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1356 		struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1357 		struct domain_device *device = sas_dev->sas_device;
1358 		struct asd_sas_port *sas_port;
1359 		struct hisi_sas_port *port;
1360 		struct hisi_sas_phy *phy = NULL;
1361 		struct asd_sas_phy *sas_phy;
1362 
1363 		if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1364 				|| !device || !device->port)
1365 			continue;
1366 
1367 		sas_port = device->port;
1368 		port = to_hisi_sas_port(sas_port);
1369 
1370 		spin_lock(&sas_port->phy_list_lock);
1371 		list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1372 			if (state & BIT(sas_phy->id)) {
1373 				phy = sas_phy->lldd_phy;
1374 				break;
1375 			}
1376 		spin_unlock(&sas_port->phy_list_lock);
1377 
1378 		if (phy) {
1379 			port->id = phy->port_id;
1380 
1381 			/* Update linkrate of directly attached device. */
1382 			if (!device->parent)
1383 				device->linkrate = phy->sas_phy.linkrate;
1384 
1385 			hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1386 		} else if (!port->port_attached)
1387 			port->id = 0xff;
1388 	}
1389 }
1390 
1391 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1392 {
1393 	struct asd_sas_port *_sas_port = NULL;
1394 	int phy_no;
1395 
1396 	for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1397 		struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1398 		struct asd_sas_phy *sas_phy = &phy->sas_phy;
1399 		struct asd_sas_port *sas_port = sas_phy->port;
1400 		bool do_port_check = _sas_port != sas_port;
1401 
1402 		if (!sas_phy->phy->enabled)
1403 			continue;
1404 
1405 		/* Report PHY state change to libsas */
1406 		if (state & BIT(phy_no)) {
1407 			if (do_port_check && sas_port && sas_port->port_dev) {
1408 				struct domain_device *dev = sas_port->port_dev;
1409 
1410 				_sas_port = sas_port;
1411 
1412 				if (dev_is_expander(dev->dev_type))
1413 					sas_notify_port_event(sas_phy,
1414 							PORTE_BROADCAST_RCVD,
1415 							GFP_KERNEL);
1416 			}
1417 		} else {
1418 			hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1419 		}
1420 	}
1421 }
1422 
1423 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1424 {
1425 	struct hisi_sas_device *sas_dev;
1426 	struct domain_device *device;
1427 	int i;
1428 
1429 	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1430 		sas_dev = &hisi_hba->devices[i];
1431 		device = sas_dev->sas_device;
1432 
1433 		if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1434 			continue;
1435 
1436 		hisi_sas_init_device(device);
1437 	}
1438 }
1439 
1440 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1441 					     struct asd_sas_port *sas_port,
1442 					     struct domain_device *device)
1443 {
1444 	struct ata_port *ap = device->sata_dev.ap;
1445 	struct device *dev = hisi_hba->dev;
1446 	int rc = TMF_RESP_FUNC_FAILED;
1447 	struct ata_link *link;
1448 	u8 fis[20] = {0};
1449 	int i;
1450 
1451 	for (i = 0; i < hisi_hba->n_phy; i++) {
1452 		if (!(sas_port->phy_mask & BIT(i)))
1453 			continue;
1454 
1455 		ata_for_each_link(link, ap, EDGE) {
1456 			int pmp = sata_srst_pmp(link);
1457 
1458 			hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1459 			rc = sas_execute_ata_cmd(device, fis, i);
1460 			if (rc != TMF_RESP_FUNC_COMPLETE) {
1461 				dev_err(dev, "phy%d ata reset failed rc=%d\n",
1462 					i, rc);
1463 				break;
1464 			}
1465 		}
1466 	}
1467 }
1468 
1469 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1470 {
1471 	struct device *dev = hisi_hba->dev;
1472 	int port_no, rc, i;
1473 
1474 	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1475 		struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1476 		struct domain_device *device = sas_dev->sas_device;
1477 
1478 		if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1479 			continue;
1480 
1481 		rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1482 		if (rc < 0)
1483 			dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1484 	}
1485 
1486 	for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1487 		struct hisi_sas_port *port = &hisi_hba->port[port_no];
1488 		struct asd_sas_port *sas_port = &port->sas_port;
1489 		struct domain_device *port_dev = sas_port->port_dev;
1490 		struct domain_device *device;
1491 
1492 		if (!port_dev || !dev_is_expander(port_dev->dev_type))
1493 			continue;
1494 
1495 		/* Try to find a SATA device */
1496 		list_for_each_entry(device, &sas_port->dev_list,
1497 				    dev_list_node) {
1498 			if (dev_is_sata(device)) {
1499 				hisi_sas_send_ata_reset_each_phy(hisi_hba,
1500 								 sas_port,
1501 								 device);
1502 				break;
1503 			}
1504 		}
1505 	}
1506 }
1507 
1508 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1509 {
1510 	struct Scsi_Host *shost = hisi_hba->shost;
1511 
1512 	hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1513 
1514 	scsi_block_requests(shost);
1515 	hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1516 
1517 	del_timer_sync(&hisi_hba->timer);
1518 
1519 	set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1520 }
1521 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1522 
1523 static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)
1524 {
1525 	struct hisi_sas_phy *phy = data;
1526 	struct hisi_hba *hisi_hba = phy->hisi_hba;
1527 	struct device *dev = hisi_hba->dev;
1528 	DECLARE_COMPLETION_ONSTACK(completion);
1529 	int phy_no = phy->sas_phy.id;
1530 
1531 	phy->reset_completion = &completion;
1532 	hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1533 	if (!wait_for_completion_timeout(&completion,
1534 					 HISI_SAS_WAIT_PHYUP_TIMEOUT))
1535 		dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);
1536 
1537 	phy->reset_completion = NULL;
1538 }
1539 
1540 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1541 {
1542 	struct Scsi_Host *shost = hisi_hba->shost;
1543 	ASYNC_DOMAIN_EXCLUSIVE(async);
1544 	int phy_no;
1545 
1546 	/* Init and wait for PHYs to come up and all libsas event finished. */
1547 	for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1548 		struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1549 
1550 		if (!(hisi_hba->phy_state & BIT(phy_no)))
1551 			continue;
1552 
1553 		async_schedule_domain(hisi_sas_async_init_wait_phyup,
1554 				      phy, &async);
1555 	}
1556 
1557 	async_synchronize_full_domain(&async);
1558 	hisi_sas_refresh_port_id(hisi_hba);
1559 	clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1560 
1561 	if (hisi_hba->reject_stp_links_msk)
1562 		hisi_sas_terminate_stp_reject(hisi_hba);
1563 	hisi_sas_reset_init_all_devices(hisi_hba);
1564 	scsi_unblock_requests(shost);
1565 	clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1566 	up(&hisi_hba->sem);
1567 
1568 	hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1569 }
1570 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1571 
1572 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1573 {
1574 	if (!hisi_hba->hw->soft_reset)
1575 		return -1;
1576 
1577 	down(&hisi_hba->sem);
1578 	if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1579 		up(&hisi_hba->sem);
1580 		return -1;
1581 	}
1582 
1583 	if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1584 		hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1585 
1586 	return 0;
1587 }
1588 
1589 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1590 {
1591 	struct device *dev = hisi_hba->dev;
1592 	struct Scsi_Host *shost = hisi_hba->shost;
1593 	int rc;
1594 
1595 	dev_info(dev, "controller resetting...\n");
1596 	hisi_sas_controller_reset_prepare(hisi_hba);
1597 
1598 	rc = hisi_hba->hw->soft_reset(hisi_hba);
1599 	if (rc) {
1600 		dev_warn(dev, "controller reset failed (%d)\n", rc);
1601 		clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1602 		up(&hisi_hba->sem);
1603 		scsi_unblock_requests(shost);
1604 		clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1605 		return rc;
1606 	}
1607 	clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1608 
1609 	hisi_sas_controller_reset_done(hisi_hba);
1610 	dev_info(dev, "controller reset complete\n");
1611 
1612 	return 0;
1613 }
1614 
1615 static int hisi_sas_abort_task(struct sas_task *task)
1616 {
1617 	struct hisi_sas_internal_abort_data internal_abort_data = { false };
1618 	struct domain_device *device = task->dev;
1619 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1620 	struct hisi_sas_slot *slot = task->lldd_task;
1621 	struct hisi_hba *hisi_hba;
1622 	struct device *dev;
1623 	int rc = TMF_RESP_FUNC_FAILED;
1624 	unsigned long flags;
1625 
1626 	if (!sas_dev)
1627 		return TMF_RESP_FUNC_FAILED;
1628 
1629 	hisi_hba = dev_to_hisi_hba(task->dev);
1630 	dev = hisi_hba->dev;
1631 
1632 	spin_lock_irqsave(&task->task_state_lock, flags);
1633 	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1634 		struct hisi_sas_cq *cq;
1635 
1636 		if (slot) {
1637 			/*
1638 			 * sync irq or poll queue to avoid free'ing task
1639 			 * before using task in IO completion
1640 			 */
1641 			cq = &hisi_hba->cq[slot->dlvry_queue];
1642 			hisi_sas_sync_cq(cq);
1643 		}
1644 		spin_unlock_irqrestore(&task->task_state_lock, flags);
1645 		rc = TMF_RESP_FUNC_COMPLETE;
1646 		goto out;
1647 	}
1648 	task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1649 	spin_unlock_irqrestore(&task->task_state_lock, flags);
1650 
1651 	if (slot && task->task_proto & SAS_PROTOCOL_SSP) {
1652 		u16 tag = slot->idx;
1653 		int rc2;
1654 
1655 		rc = sas_abort_task(task, tag);
1656 		rc2 = sas_execute_internal_abort_single(device, tag,
1657 				slot->dlvry_queue, &internal_abort_data);
1658 		if (rc2 < 0) {
1659 			dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1660 			return TMF_RESP_FUNC_FAILED;
1661 		}
1662 
1663 		/*
1664 		 * If the TMF finds that the IO is not in the device and also
1665 		 * the internal abort does not succeed, then it is safe to
1666 		 * free the slot.
1667 		 * Note: if the internal abort succeeds then the slot
1668 		 * will have already been completed
1669 		 */
1670 		if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1671 			if (task->lldd_task)
1672 				hisi_sas_do_release_task(hisi_hba, task, slot, true);
1673 		}
1674 	} else if (task->task_proto & SAS_PROTOCOL_SATA ||
1675 		task->task_proto & SAS_PROTOCOL_STP) {
1676 		if (task->dev->dev_type == SAS_SATA_DEV) {
1677 			struct ata_queued_cmd *qc = task->uldd_task;
1678 
1679 			rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1680 			if (rc < 0) {
1681 				dev_err(dev, "abort task: internal abort failed\n");
1682 				goto out;
1683 			}
1684 			hisi_sas_dereg_device(hisi_hba, device);
1685 
1686 			/*
1687 			 * If an ATA internal command times out in ATA EH, it
1688 			 * need to execute soft reset, so check the scsicmd
1689 			 */
1690 			if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1691 			    qc && qc->scsicmd) {
1692 				hisi_sas_do_release_task(hisi_hba, task, slot, true);
1693 				rc = TMF_RESP_FUNC_COMPLETE;
1694 			} else {
1695 				rc = hisi_sas_softreset_ata_disk(device);
1696 			}
1697 		}
1698 	} else if (slot && task->task_proto & SAS_PROTOCOL_SMP) {
1699 		/* SMP */
1700 		u32 tag = slot->idx;
1701 		struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1702 
1703 		rc = sas_execute_internal_abort_single(device,
1704 						       tag, slot->dlvry_queue,
1705 						       &internal_abort_data);
1706 		if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1707 					task->lldd_task) {
1708 			/*
1709 			 * sync irq or poll queue to avoid free'ing task
1710 			 * before using task in IO completion
1711 			 */
1712 			hisi_sas_sync_cq(cq);
1713 			slot->task = NULL;
1714 		}
1715 	}
1716 
1717 out:
1718 	if (rc != TMF_RESP_FUNC_COMPLETE)
1719 		dev_notice(dev, "abort task: rc=%d\n", rc);
1720 	return rc;
1721 }
1722 
1723 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1724 {
1725 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1726 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1727 	struct device *dev = hisi_hba->dev;
1728 	int rc;
1729 
1730 	rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1731 	if (rc < 0) {
1732 		dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1733 		return TMF_RESP_FUNC_FAILED;
1734 	}
1735 	hisi_sas_dereg_device(hisi_hba, device);
1736 
1737 	rc = sas_abort_task_set(device, lun);
1738 	if (rc == TMF_RESP_FUNC_COMPLETE)
1739 		hisi_sas_release_task(hisi_hba, device);
1740 
1741 	return rc;
1742 }
1743 
1744 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1745 {
1746 	struct sas_phy *local_phy = sas_get_local_phy(device);
1747 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1748 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1749 	struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1750 	int rc, reset_type;
1751 
1752 	if (!local_phy->enabled) {
1753 		sas_put_local_phy(local_phy);
1754 		return -ENODEV;
1755 	}
1756 
1757 	if (scsi_is_sas_phy_local(local_phy)) {
1758 		struct asd_sas_phy *sas_phy =
1759 			sas_ha->sas_phy[local_phy->number];
1760 		struct hisi_sas_phy *phy =
1761 			container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1762 		unsigned long flags;
1763 
1764 		spin_lock_irqsave(&phy->lock, flags);
1765 		phy->in_reset = 1;
1766 		spin_unlock_irqrestore(&phy->lock, flags);
1767 	}
1768 
1769 	reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1770 		      !dev_is_sata(device)) ? true : false;
1771 
1772 	rc = sas_phy_reset(local_phy, reset_type);
1773 	sas_put_local_phy(local_phy);
1774 
1775 	if (scsi_is_sas_phy_local(local_phy)) {
1776 		struct asd_sas_phy *sas_phy =
1777 			sas_ha->sas_phy[local_phy->number];
1778 		struct hisi_sas_phy *phy =
1779 			container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1780 		unsigned long flags;
1781 
1782 		spin_lock_irqsave(&phy->lock, flags);
1783 		phy->in_reset = 0;
1784 		spin_unlock_irqrestore(&phy->lock, flags);
1785 
1786 		/* report PHY down if timed out */
1787 		if (rc == -ETIMEDOUT)
1788 			hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1789 		return rc;
1790 	}
1791 
1792 	/* Remote phy */
1793 	if (rc)
1794 		return rc;
1795 
1796 	if (dev_is_sata(device)) {
1797 		struct ata_link *link = &device->sata_dev.ap->link;
1798 
1799 		rc = ata_wait_after_reset(link, HISI_SAS_WAIT_PHYUP_TIMEOUT,
1800 					  smp_ata_check_ready_type);
1801 	} else {
1802 		msleep(2000);
1803 	}
1804 
1805 	return rc;
1806 }
1807 
1808 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1809 {
1810 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1811 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1812 	struct device *dev = hisi_hba->dev;
1813 	int rc;
1814 
1815 	if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1816 		sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1817 
1818 	rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1819 	if (rc < 0) {
1820 		dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1821 		return TMF_RESP_FUNC_FAILED;
1822 	}
1823 	hisi_sas_dereg_device(hisi_hba, device);
1824 
1825 	rc = hisi_sas_debug_I_T_nexus_reset(device);
1826 	if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {
1827 		struct sas_phy *local_phy;
1828 
1829 		rc = hisi_sas_softreset_ata_disk(device);
1830 		switch (rc) {
1831 		case -ECOMM:
1832 			rc = -ENODEV;
1833 			break;
1834 		case TMF_RESP_FUNC_FAILED:
1835 		case -EMSGSIZE:
1836 		case -EIO:
1837 			local_phy = sas_get_local_phy(device);
1838 			rc = sas_phy_enable(local_phy, 0);
1839 			if (!rc) {
1840 				local_phy->enabled = 0;
1841 				dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",
1842 					SAS_ADDR(device->sas_addr), rc);
1843 				rc = -ENODEV;
1844 			}
1845 			sas_put_local_phy(local_phy);
1846 			break;
1847 		default:
1848 			break;
1849 		}
1850 	}
1851 
1852 	if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1853 		hisi_sas_release_task(hisi_hba, device);
1854 
1855 	return rc;
1856 }
1857 
1858 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1859 {
1860 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1861 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1862 	struct device *dev = hisi_hba->dev;
1863 	int rc = TMF_RESP_FUNC_FAILED;
1864 
1865 	/* Clear internal IO and then lu reset */
1866 	rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1867 	if (rc < 0) {
1868 		dev_err(dev, "lu_reset: internal abort failed\n");
1869 		goto out;
1870 	}
1871 	hisi_sas_dereg_device(hisi_hba, device);
1872 
1873 	if (dev_is_sata(device)) {
1874 		struct sas_phy *phy;
1875 
1876 		phy = sas_get_local_phy(device);
1877 
1878 		rc = sas_phy_reset(phy, true);
1879 
1880 		if (rc == 0)
1881 			hisi_sas_release_task(hisi_hba, device);
1882 		sas_put_local_phy(phy);
1883 	} else {
1884 		rc = sas_lu_reset(device, lun);
1885 		if (rc == TMF_RESP_FUNC_COMPLETE)
1886 			hisi_sas_release_task(hisi_hba, device);
1887 	}
1888 out:
1889 	if (rc != TMF_RESP_FUNC_COMPLETE)
1890 		dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1891 			     sas_dev->device_id, rc);
1892 	return rc;
1893 }
1894 
1895 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1896 {
1897 	struct domain_device *device = data;
1898 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1899 	int rc;
1900 
1901 	rc = hisi_sas_debug_I_T_nexus_reset(device);
1902 	if (rc != TMF_RESP_FUNC_COMPLETE)
1903 		dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1904 			 SAS_ADDR(device->sas_addr), rc);
1905 }
1906 
1907 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1908 {
1909 	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1910 	HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1911 	ASYNC_DOMAIN_EXCLUSIVE(async);
1912 	int i;
1913 
1914 	queue_work(hisi_hba->wq, &r.work);
1915 	wait_for_completion(r.completion);
1916 	if (!r.done)
1917 		return TMF_RESP_FUNC_FAILED;
1918 
1919 	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1920 		struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1921 		struct domain_device *device = sas_dev->sas_device;
1922 
1923 		if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1924 		    dev_is_expander(device->dev_type))
1925 			continue;
1926 
1927 		async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1928 				      device, &async);
1929 	}
1930 
1931 	async_synchronize_full_domain(&async);
1932 	hisi_sas_release_tasks(hisi_hba);
1933 
1934 	return TMF_RESP_FUNC_COMPLETE;
1935 }
1936 
1937 static int hisi_sas_query_task(struct sas_task *task)
1938 {
1939 	int rc = TMF_RESP_FUNC_FAILED;
1940 
1941 	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1942 		struct hisi_sas_slot *slot = task->lldd_task;
1943 		u32 tag = slot->idx;
1944 
1945 		rc = sas_query_task(task, tag);
1946 		switch (rc) {
1947 		/* The task is still in Lun, release it then */
1948 		case TMF_RESP_FUNC_SUCC:
1949 		/* The task is not in Lun or failed, reset the phy */
1950 		case TMF_RESP_FUNC_FAILED:
1951 		case TMF_RESP_FUNC_COMPLETE:
1952 			break;
1953 		default:
1954 			rc = TMF_RESP_FUNC_FAILED;
1955 			break;
1956 		}
1957 	}
1958 	return rc;
1959 }
1960 
1961 static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
1962 					    void *data)
1963 {
1964 	struct domain_device *device = task->dev;
1965 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1966 	struct hisi_sas_internal_abort_data *timeout = data;
1967 
1968 	if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1969 		queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1970 
1971 	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1972 		pr_err("Internal abort: timeout %016llx\n",
1973 		       SAS_ADDR(device->sas_addr));
1974 	} else {
1975 		struct hisi_sas_slot *slot = task->lldd_task;
1976 
1977 		set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1978 
1979 		if (slot) {
1980 			struct hisi_sas_cq *cq =
1981 				&hisi_hba->cq[slot->dlvry_queue];
1982 			/*
1983 			 * sync irq or poll queue to avoid free'ing task
1984 			 * before using task in IO completion
1985 			 */
1986 			hisi_sas_sync_cq(cq);
1987 			slot->task = NULL;
1988 		}
1989 
1990 		if (timeout->rst_ha_timeout) {
1991 			pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
1992 			       SAS_ADDR(device->sas_addr));
1993 			queue_work(hisi_hba->wq, &hisi_hba->rst_work);
1994 		} else {
1995 			pr_err("Internal abort: timeout and not done %016llx.\n",
1996 			       SAS_ADDR(device->sas_addr));
1997 		}
1998 
1999 		return true;
2000 	}
2001 
2002 	return false;
2003 }
2004 
2005 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2006 {
2007 	hisi_sas_port_notify_formed(sas_phy);
2008 }
2009 
2010 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2011 			u8 reg_index, u8 reg_count, u8 *write_data)
2012 {
2013 	struct hisi_hba *hisi_hba = sha->lldd_ha;
2014 
2015 	if (!hisi_hba->hw->write_gpio)
2016 		return -EOPNOTSUPP;
2017 
2018 	return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2019 				reg_index, reg_count, write_data);
2020 }
2021 
2022 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2023 {
2024 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
2025 	struct sas_phy *sphy = sas_phy->phy;
2026 	unsigned long flags;
2027 
2028 	phy->phy_attached = 0;
2029 	phy->phy_type = 0;
2030 	phy->port = NULL;
2031 
2032 	spin_lock_irqsave(&phy->lock, flags);
2033 	if (phy->enable)
2034 		sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2035 	else
2036 		sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2037 	spin_unlock_irqrestore(&phy->lock, flags);
2038 }
2039 
2040 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2041 		       gfp_t gfp_flags)
2042 {
2043 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2044 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
2045 	struct device *dev = hisi_hba->dev;
2046 
2047 	if (rdy) {
2048 		/* Phy down but ready */
2049 		hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2050 		hisi_sas_port_notify_formed(sas_phy);
2051 	} else {
2052 		struct hisi_sas_port *port  = phy->port;
2053 
2054 		if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2055 		    phy->in_reset) {
2056 			dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2057 			return;
2058 		}
2059 		/* Phy down and not ready */
2060 		sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2061 		sas_phy_disconnected(sas_phy);
2062 
2063 		if (port) {
2064 			if (phy->phy_type & PORT_TYPE_SAS) {
2065 				int port_id = port->id;
2066 
2067 				if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2068 								       port_id))
2069 					port->port_attached = 0;
2070 			} else if (phy->phy_type & PORT_TYPE_SATA)
2071 				port->port_attached = 0;
2072 		}
2073 		hisi_sas_phy_disconnected(phy);
2074 	}
2075 }
2076 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2077 
2078 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
2079 {
2080 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
2081 	struct hisi_hba	*hisi_hba = phy->hisi_hba;
2082 
2083 	if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
2084 		return;
2085 
2086 	sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
2087 }
2088 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
2089 
2090 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2091 {
2092 	struct hisi_hba *hisi_hba = shost_priv(shost);
2093 
2094 	if (reset_type != SCSI_ADAPTER_RESET)
2095 		return -EOPNOTSUPP;
2096 
2097 	queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2098 
2099 	return 0;
2100 }
2101 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2102 
2103 struct scsi_transport_template *hisi_sas_stt;
2104 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2105 
2106 static struct sas_domain_function_template hisi_sas_transport_ops = {
2107 	.lldd_dev_found		= hisi_sas_dev_found,
2108 	.lldd_dev_gone		= hisi_sas_dev_gone,
2109 	.lldd_execute_task	= hisi_sas_queue_command,
2110 	.lldd_control_phy	= hisi_sas_control_phy,
2111 	.lldd_abort_task	= hisi_sas_abort_task,
2112 	.lldd_abort_task_set	= hisi_sas_abort_task_set,
2113 	.lldd_I_T_nexus_reset	= hisi_sas_I_T_nexus_reset,
2114 	.lldd_lu_reset		= hisi_sas_lu_reset,
2115 	.lldd_query_task	= hisi_sas_query_task,
2116 	.lldd_clear_nexus_ha	= hisi_sas_clear_nexus_ha,
2117 	.lldd_port_formed	= hisi_sas_port_formed,
2118 	.lldd_write_gpio	= hisi_sas_write_gpio,
2119 	.lldd_tmf_aborted	= hisi_sas_tmf_aborted,
2120 	.lldd_abort_timeout	= hisi_sas_internal_abort_timeout,
2121 };
2122 
2123 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2124 {
2125 	int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2126 	struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2127 
2128 	for (i = 0; i < hisi_hba->queue_count; i++) {
2129 		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2130 		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2131 		struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2132 
2133 		s = sizeof(struct hisi_sas_cmd_hdr);
2134 		for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2135 			memset(&cmd_hdr[j], 0, s);
2136 
2137 		dq->wr_point = 0;
2138 
2139 		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2140 		memset(hisi_hba->complete_hdr[i], 0, s);
2141 		cq->rd_point = 0;
2142 	}
2143 
2144 	s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2145 	memset(hisi_hba->initial_fis, 0, s);
2146 
2147 	s = max_command_entries * sizeof(struct hisi_sas_iost);
2148 	memset(hisi_hba->iost, 0, s);
2149 
2150 	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2151 	memset(hisi_hba->breakpoint, 0, s);
2152 
2153 	s = sizeof(struct hisi_sas_sata_breakpoint);
2154 	for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2155 		memset(&sata_breakpoint[j], 0, s);
2156 }
2157 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2158 
2159 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2160 {
2161 	struct device *dev = hisi_hba->dev;
2162 	int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2163 	int max_command_entries_ru, sz_slot_buf_ru;
2164 	int blk_cnt, slots_per_blk;
2165 
2166 	sema_init(&hisi_hba->sem, 1);
2167 	spin_lock_init(&hisi_hba->lock);
2168 	for (i = 0; i < hisi_hba->n_phy; i++) {
2169 		hisi_sas_phy_init(hisi_hba, i);
2170 		hisi_hba->port[i].port_attached = 0;
2171 		hisi_hba->port[i].id = -1;
2172 	}
2173 
2174 	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2175 		hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2176 		hisi_hba->devices[i].device_id = i;
2177 		hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2178 	}
2179 
2180 	for (i = 0; i < hisi_hba->queue_count; i++) {
2181 		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2182 		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2183 
2184 		/* Completion queue structure */
2185 		cq->id = i;
2186 		cq->hisi_hba = hisi_hba;
2187 		spin_lock_init(&cq->poll_lock);
2188 
2189 		/* Delivery queue structure */
2190 		spin_lock_init(&dq->lock);
2191 		INIT_LIST_HEAD(&dq->list);
2192 		dq->id = i;
2193 		dq->hisi_hba = hisi_hba;
2194 
2195 		/* Delivery queue */
2196 		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2197 		hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2198 						&hisi_hba->cmd_hdr_dma[i],
2199 						GFP_KERNEL);
2200 		if (!hisi_hba->cmd_hdr[i])
2201 			goto err_out;
2202 
2203 		/* Completion queue */
2204 		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2205 		hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2206 						&hisi_hba->complete_hdr_dma[i],
2207 						GFP_KERNEL);
2208 		if (!hisi_hba->complete_hdr[i])
2209 			goto err_out;
2210 	}
2211 
2212 	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2213 	hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2214 					     GFP_KERNEL);
2215 	if (!hisi_hba->itct)
2216 		goto err_out;
2217 
2218 	hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2219 					   sizeof(struct hisi_sas_slot),
2220 					   GFP_KERNEL);
2221 	if (!hisi_hba->slot_info)
2222 		goto err_out;
2223 
2224 	/* roundup to avoid overly large block size */
2225 	max_command_entries_ru = roundup(max_command_entries, 64);
2226 	if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2227 		sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2228 	else
2229 		sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2230 	sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2231 	s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2232 	blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2233 	slots_per_blk = s / sz_slot_buf_ru;
2234 
2235 	for (i = 0; i < blk_cnt; i++) {
2236 		int slot_index = i * slots_per_blk;
2237 		dma_addr_t buf_dma;
2238 		void *buf;
2239 
2240 		buf = dmam_alloc_coherent(dev, s, &buf_dma,
2241 					  GFP_KERNEL);
2242 		if (!buf)
2243 			goto err_out;
2244 
2245 		for (j = 0; j < slots_per_blk; j++, slot_index++) {
2246 			struct hisi_sas_slot *slot;
2247 
2248 			slot = &hisi_hba->slot_info[slot_index];
2249 			slot->buf = buf;
2250 			slot->buf_dma = buf_dma;
2251 			slot->idx = slot_index;
2252 
2253 			buf += sz_slot_buf_ru;
2254 			buf_dma += sz_slot_buf_ru;
2255 		}
2256 	}
2257 
2258 	s = max_command_entries * sizeof(struct hisi_sas_iost);
2259 	hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2260 					     GFP_KERNEL);
2261 	if (!hisi_hba->iost)
2262 		goto err_out;
2263 
2264 	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2265 	hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2266 						   &hisi_hba->breakpoint_dma,
2267 						   GFP_KERNEL);
2268 	if (!hisi_hba->breakpoint)
2269 		goto err_out;
2270 
2271 	s = hisi_hba->slot_index_count = max_command_entries;
2272 	hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2273 	if (!hisi_hba->slot_index_tags)
2274 		goto err_out;
2275 
2276 	s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2277 	hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2278 						    &hisi_hba->initial_fis_dma,
2279 						    GFP_KERNEL);
2280 	if (!hisi_hba->initial_fis)
2281 		goto err_out;
2282 
2283 	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2284 	hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2285 					&hisi_hba->sata_breakpoint_dma,
2286 					GFP_KERNEL);
2287 	if (!hisi_hba->sata_breakpoint)
2288 		goto err_out;
2289 
2290 	hisi_hba->last_slot_index = 0;
2291 
2292 	hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2293 	if (!hisi_hba->wq) {
2294 		dev_err(dev, "sas_alloc: failed to create workqueue\n");
2295 		goto err_out;
2296 	}
2297 
2298 	return 0;
2299 err_out:
2300 	return -ENOMEM;
2301 }
2302 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2303 
2304 void hisi_sas_free(struct hisi_hba *hisi_hba)
2305 {
2306 	int i;
2307 
2308 	for (i = 0; i < hisi_hba->n_phy; i++) {
2309 		struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2310 
2311 		del_timer_sync(&phy->timer);
2312 	}
2313 
2314 	if (hisi_hba->wq)
2315 		destroy_workqueue(hisi_hba->wq);
2316 }
2317 EXPORT_SYMBOL_GPL(hisi_sas_free);
2318 
2319 void hisi_sas_rst_work_handler(struct work_struct *work)
2320 {
2321 	struct hisi_hba *hisi_hba =
2322 		container_of(work, struct hisi_hba, rst_work);
2323 
2324 	if (hisi_sas_controller_prereset(hisi_hba))
2325 		return;
2326 
2327 	hisi_sas_controller_reset(hisi_hba);
2328 }
2329 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2330 
2331 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2332 {
2333 	struct hisi_sas_rst *rst =
2334 		container_of(work, struct hisi_sas_rst, work);
2335 
2336 	if (hisi_sas_controller_prereset(rst->hisi_hba))
2337 		goto rst_complete;
2338 
2339 	if (!hisi_sas_controller_reset(rst->hisi_hba))
2340 		rst->done = true;
2341 rst_complete:
2342 	complete(rst->completion);
2343 }
2344 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2345 
2346 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2347 {
2348 	struct device *dev = hisi_hba->dev;
2349 	struct platform_device *pdev = hisi_hba->platform_dev;
2350 	struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2351 	struct clk *refclk;
2352 
2353 	if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2354 					  SAS_ADDR_SIZE)) {
2355 		dev_err(dev, "could not get property sas-addr\n");
2356 		return -ENOENT;
2357 	}
2358 
2359 	if (np) {
2360 		/*
2361 		 * These properties are only required for platform device-based
2362 		 * controller with DT firmware.
2363 		 */
2364 		hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2365 					"hisilicon,sas-syscon");
2366 		if (IS_ERR(hisi_hba->ctrl)) {
2367 			dev_err(dev, "could not get syscon\n");
2368 			return -ENOENT;
2369 		}
2370 
2371 		if (device_property_read_u32(dev, "ctrl-reset-reg",
2372 					     &hisi_hba->ctrl_reset_reg)) {
2373 			dev_err(dev, "could not get property ctrl-reset-reg\n");
2374 			return -ENOENT;
2375 		}
2376 
2377 		if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2378 					     &hisi_hba->ctrl_reset_sts_reg)) {
2379 			dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2380 			return -ENOENT;
2381 		}
2382 
2383 		if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2384 					     &hisi_hba->ctrl_clock_ena_reg)) {
2385 			dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2386 			return -ENOENT;
2387 		}
2388 	}
2389 
2390 	refclk = devm_clk_get(dev, NULL);
2391 	if (IS_ERR(refclk))
2392 		dev_dbg(dev, "no ref clk property\n");
2393 	else
2394 		hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2395 
2396 	if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2397 		dev_err(dev, "could not get property phy-count\n");
2398 		return -ENOENT;
2399 	}
2400 
2401 	if (device_property_read_u32(dev, "queue-count",
2402 				     &hisi_hba->queue_count)) {
2403 		dev_err(dev, "could not get property queue-count\n");
2404 		return -ENOENT;
2405 	}
2406 
2407 	return 0;
2408 }
2409 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2410 
2411 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2412 					      const struct hisi_sas_hw *hw)
2413 {
2414 	struct resource *res;
2415 	struct Scsi_Host *shost;
2416 	struct hisi_hba *hisi_hba;
2417 	struct device *dev = &pdev->dev;
2418 	int error;
2419 
2420 	shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2421 	if (!shost) {
2422 		dev_err(dev, "scsi host alloc failed\n");
2423 		return NULL;
2424 	}
2425 	hisi_hba = shost_priv(shost);
2426 
2427 	INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2428 	hisi_hba->hw = hw;
2429 	hisi_hba->dev = dev;
2430 	hisi_hba->platform_dev = pdev;
2431 	hisi_hba->shost = shost;
2432 	SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2433 
2434 	timer_setup(&hisi_hba->timer, NULL, 0);
2435 
2436 	if (hisi_sas_get_fw_info(hisi_hba) < 0)
2437 		goto err_out;
2438 
2439 	error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2440 	if (error) {
2441 		dev_err(dev, "No usable DMA addressing method\n");
2442 		goto err_out;
2443 	}
2444 
2445 	hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2446 	if (IS_ERR(hisi_hba->regs))
2447 		goto err_out;
2448 
2449 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2450 	if (res) {
2451 		hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2452 		if (IS_ERR(hisi_hba->sgpio_regs))
2453 			goto err_out;
2454 	}
2455 
2456 	if (hisi_sas_alloc(hisi_hba)) {
2457 		hisi_sas_free(hisi_hba);
2458 		goto err_out;
2459 	}
2460 
2461 	return shost;
2462 err_out:
2463 	scsi_host_put(shost);
2464 	dev_err(dev, "shost alloc failed\n");
2465 	return NULL;
2466 }
2467 
2468 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2469 {
2470 	if (hisi_hba->hw->interrupt_preinit)
2471 		return hisi_hba->hw->interrupt_preinit(hisi_hba);
2472 	return 0;
2473 }
2474 
2475 int hisi_sas_probe(struct platform_device *pdev,
2476 		   const struct hisi_sas_hw *hw)
2477 {
2478 	struct Scsi_Host *shost;
2479 	struct hisi_hba *hisi_hba;
2480 	struct device *dev = &pdev->dev;
2481 	struct asd_sas_phy **arr_phy;
2482 	struct asd_sas_port **arr_port;
2483 	struct sas_ha_struct *sha;
2484 	int rc, phy_nr, port_nr, i;
2485 
2486 	shost = hisi_sas_shost_alloc(pdev, hw);
2487 	if (!shost)
2488 		return -ENOMEM;
2489 
2490 	sha = SHOST_TO_SAS_HA(shost);
2491 	hisi_hba = shost_priv(shost);
2492 	platform_set_drvdata(pdev, sha);
2493 
2494 	phy_nr = port_nr = hisi_hba->n_phy;
2495 
2496 	arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2497 	arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2498 	if (!arr_phy || !arr_port) {
2499 		rc = -ENOMEM;
2500 		goto err_out_ha;
2501 	}
2502 
2503 	sha->sas_phy = arr_phy;
2504 	sha->sas_port = arr_port;
2505 	sha->lldd_ha = hisi_hba;
2506 
2507 	shost->transportt = hisi_sas_stt;
2508 	shost->max_id = HISI_SAS_MAX_DEVICES;
2509 	shost->max_lun = ~0;
2510 	shost->max_channel = 1;
2511 	shost->max_cmd_len = 16;
2512 	if (hisi_hba->hw->slot_index_alloc) {
2513 		shost->can_queue = HISI_SAS_MAX_COMMANDS;
2514 		shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2515 	} else {
2516 		shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2517 		shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2518 	}
2519 
2520 	sha->sas_ha_name = DRV_NAME;
2521 	sha->dev = hisi_hba->dev;
2522 	sha->lldd_module = THIS_MODULE;
2523 	sha->sas_addr = &hisi_hba->sas_addr[0];
2524 	sha->num_phys = hisi_hba->n_phy;
2525 	sha->core.shost = hisi_hba->shost;
2526 
2527 	for (i = 0; i < hisi_hba->n_phy; i++) {
2528 		sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2529 		sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2530 	}
2531 
2532 	rc = hisi_sas_interrupt_preinit(hisi_hba);
2533 	if (rc)
2534 		goto err_out_ha;
2535 
2536 	rc = scsi_add_host(shost, &pdev->dev);
2537 	if (rc)
2538 		goto err_out_ha;
2539 
2540 	rc = sas_register_ha(sha);
2541 	if (rc)
2542 		goto err_out_register_ha;
2543 
2544 	rc = hisi_hba->hw->hw_init(hisi_hba);
2545 	if (rc)
2546 		goto err_out_hw_init;
2547 
2548 	scsi_scan_host(shost);
2549 
2550 	return 0;
2551 
2552 err_out_hw_init:
2553 	sas_unregister_ha(sha);
2554 err_out_register_ha:
2555 	scsi_remove_host(shost);
2556 err_out_ha:
2557 	hisi_sas_free(hisi_hba);
2558 	scsi_host_put(shost);
2559 	return rc;
2560 }
2561 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2562 
2563 void hisi_sas_remove(struct platform_device *pdev)
2564 {
2565 	struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2566 	struct hisi_hba *hisi_hba = sha->lldd_ha;
2567 	struct Scsi_Host *shost = sha->core.shost;
2568 
2569 	del_timer_sync(&hisi_hba->timer);
2570 
2571 	sas_unregister_ha(sha);
2572 	sas_remove_host(sha->core.shost);
2573 
2574 	hisi_sas_free(hisi_hba);
2575 	scsi_host_put(shost);
2576 }
2577 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2578 
2579 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2580 #define DEBUGFS_ENABLE_DEFAULT  "enabled"
2581 bool hisi_sas_debugfs_enable = true;
2582 u32 hisi_sas_debugfs_dump_count = 50;
2583 #else
2584 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2585 bool hisi_sas_debugfs_enable;
2586 u32 hisi_sas_debugfs_dump_count = 1;
2587 #endif
2588 
2589 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2590 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2591 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2592 		 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2593 
2594 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2595 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2596 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2597 
2598 struct dentry *hisi_sas_debugfs_dir;
2599 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2600 
2601 static __init int hisi_sas_init(void)
2602 {
2603 	hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2604 	if (!hisi_sas_stt)
2605 		return -ENOMEM;
2606 
2607 	if (hisi_sas_debugfs_enable) {
2608 		hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2609 		if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2610 			pr_info("hisi_sas: Limiting debugfs dump count\n");
2611 			hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2612 		}
2613 	}
2614 
2615 	return 0;
2616 }
2617 
2618 static __exit void hisi_sas_exit(void)
2619 {
2620 	sas_release_transport(hisi_sas_stt);
2621 
2622 	debugfs_remove(hisi_sas_debugfs_dir);
2623 }
2624 
2625 module_init(hisi_sas_init);
2626 module_exit(hisi_sas_exit);
2627 
2628 MODULE_LICENSE("GPL");
2629 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2630 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2631 MODULE_ALIAS("platform:" DRV_NAME);
2632